Calf exercise apparatus



FIG. 1 is a front elevation view of a calf exercise apparatus showing my new design showing a weight bar, a rack, and a bench separated for clarity;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right elevation view thereof, the opposite side being a mirror image of the shown;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is an isometric view thereof; and,

FIG. 7 is an in-use isometric view thereof.

The broken lines in FIG. 7 depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a calf exercise apparatus, as shown and described. 